Improvement in pipe-cutters



"J NITED STATES PATENT CDIrIrIcEk WILLIAM R. DALEs, AND ooMEGYs o.LUsBY, oF PHILADELPHIA, PA.

IM PROVEMENT IN PIPE-CUTTERS.

Specification forming part of` Letters Patent No. 182,174, datedSeptember 12, 1876 application tiled August 2, 1876.

To all whom lt may concern' r Beit known that we, WILLIAM R. DALEs,

i and comers GIUSBY, both of the any and county of Phlladelphia, in theState of Pennv Sylvania, have invented certain new and usefulImprovementsin `Pipe-Gutters, of which the following is a specificationThe object of our invention is to provide a device for cutting andthreading gas and other metallic pipes, which shall, within smalloomsocket back and forth, and cutting tool or die upon the pipe, all ashereinafter more fully set forth.

1n the accompanying drawings, Figure lis Y a side view, in elevation, ofa pipe-cutter embodying o'ur improvements; Fig. 2, an end view; Fig. 3,a transverse section at the line a: mot' Fig. 1 Fig. 4, a similarsection at the line y y ot Fig. l; Fig. 5, a longitudinal centralsection; and Fig. 6, an end viewl of the screw-cutting die.'

To carry ont the object of our invention, we

provide a cylindrical tubular socket, A, the internal diameter of whichis sufficient/to admit easily the pipe to be operated upon, whichysocket is divided longitudinally into two sections, and is formed with acounter-bore or recess ot greater diameter at one or both of its ends. Acutting-tool, a, is connected adjustably to the socket, so as to havethe capacity of being movedl` toward and from its'axis-in this instanceby a screw,a,1, working in a nut, a2, on one of the sections of thesocket. A

similar cutting-tool may be placed upon the opposite section, if deemedexpedient. The

two sections of 'the socket are united by pins a6 passing through lugsrif/,and the socket, when closed, is encircled by a divided clamp orcasing, B, within which it tits easily,"and

by which it maybe supported, end motion being prevented by a circularbead, a3, on the socket fitting a corresponding groove in the casing.The halves ot' the casing are pro.

vided with lugs b, through which pins` b1, by which they are hingedtogether, pass. A socket, b2, is formed on oneof the halves of the`casing B, for the insertion of a handle, b3, for

holding the same, or the handle may be formed directly on or in onepiece with the clamp, if

preferred.

A collar, C, formed in twov sections hinged together, encircles thesocket- A near one of its ends, and is4 provided with a handle, C',

tion, as required, by the handle C. Instead of the pawl-and-ratchetmechanism shown, the socket might be arranged to be turned by a wrench,if preferred, but we Adeem the arrangement shown to be more convenientand desirable. Divided thimbles a, of different thicknesses, may heinserted within the socket, to adapt it to pipes of smaller diameters.

For the purposeot' cutting threads upon the outer surface of a pipe,ascrew-cutting die,

D, is inserted in the recess or counter-bore of l the socket A, at theend opposite that to whichv the cutting-tool a. is attached, and can besc cured in position either by set-screws or keys, or by having itssides squared and fitting a corresponding recess, with a cap, d, toretain it in position, as shownin Figs. 5 and 6. y

In order to start`V the cut of the die D, and impart a`longitudna1 feedthereto, a collar, E, having an external thread for a portion of itslength, of similar pitch to that of the die D, is inserted in thecounter-bore of the socket A, at the end opposite that to which thedieis secured, the thread of -the collar E engaging a correspondinginternal thread ou a collar, E', which is clamped fast to the pipe bysetscrews e bearing on a thimble, e', placed on the pipe.

In the operation of the device, in cutting pipe, the sections of thesocket A are put together around the pipeF at anydesired point, and theoasingB and collar C fastenedaround them, the casing B being heldvstationary, simply to support the pipe while it is cut, by engaging thepawl c with the ratchet a4, and rotating the socket within the clamp inthe directionof the arrow; the tool a being fed inward, as required,until the cut is completed.

. For cutting a thread upon a pipe, the collar E is secured to thesocket A, (the tool @being rst drawn out so as to be clear of the pipe,)and the die D is made fast in position at the opposite end.' The collarE and thimble e' being then clamped fast upon the pipe at such a pointas will enable the threads ot' the collars E and E to be in connectionbefore the die commences its cut, the socket A is turned in oppositedirection to the arrow by engaging the pawl c and ratchet a5, carryingWith itthe die D and cutting the thread required.

By the use of our improvements we are enabled to cut and thread pipe atany desired hp 'oint Without necessitating the breaking of joints orremoval 'of other portions, while the small amount of projection of thesocket and casing beyond the pipe, with the capability of adjusting thedevice thereon at any desired angle, enables it to be operated withincontracted limits, and without interference from adjacent objects, l

We claim as our invention and desire to secure by Letters Patentl. Thedivided collar C, having handle C',

and pawls c' c', in combination with the socket

